English
Adjusting idle speed
A slight correction of the setting may be
necessary if the engine does not run
satisfactorily:
Adjusting the Carburetor
Engine stops while idling
N
N
N
Check the standard setting.
Warm up the engine.
General information
N
Turn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 1 turn.
The carburetor comes from the factory
with a standard setting.
Turn high speed screw (H) slightly
clockwise (leaner) – no further than
stop.
N
Turn the idle speed screw (LA)
clockwise until the chain begins to
run – then back it off 2 turns.
This settingprovides an optimum fuel-air
mixture under most operating
conditions.
If the setting is too lean there is a
risk of engine damage due to
insufficient lubrication and
overheating.
Chain runs when engine is idling
With this carburetor it is only possible to
correct the adjusting screws within fine
limits.
N
Turn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 1 turn.
Standard setting
N
Turn the idle speed screw (LA)
counterclockwise until the chain
begins to run – then turn it another
N
N
Switch off the engine.
2
turns in the same direction.
Check the air filter and clean or
replace if necessary.
If the chain continues moving
when the engine is idling, have
your saw checked and repaired by
your servicing dealer.
N
Check the spark arresting screen
(country-specific) in the muffler and
clean or replace if necessary.
Erratic idling behavior, poor
acceleration (even though standard
setting of low speed screw is correct)
Idle setting is too lean –
H
L
1
3
/4
N
Idle setting is too lean: Turn the low
speed screw (L) counterclockwise
until the engine runs and
LA
accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
N
N
Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
Turn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 1 turn.
Fine tuning for operation at high
altitude
MS 171, MS 181, MS 181 C, MS 211, MS 211 C
39
| Categories | Chainsaw Manuals, STIHL Chainsaw Manuals |
|---|---|
| Tags | STIHL MS 171, STIHL MS 181, STIHL MS 211 |
| Download File |
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| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Chainsaw |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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